>>2169338>I haven't been using strokes, just the outline modeDoubt it... Pretty much every single shape in your screenshot was made with strokes enabled...
Look at pic related. See those hollow squares where the red arrows are pointing? See how they're black? That means you are drawing with a stroke. Select ALL your lines, then click on that hollow square, and finally on the "none" option where the blue arrow is pointing. This will eliminate the strokes from all your shapes.
>I noticed in >>2168184 (You), for the right hair strand, you have nodes opposite each other.Yes. Because that part of the line is outside of the Artboard and will be cropped off automatically when the image gets exported.
>What is a mechanical shape?Literally what it sounds like... Gears, robotic parts, etc.